83678513 has 4 divisors (see below), whose sum is σ = 84824868. Its totient is φ = 82532160.

The previous prime is 83678501. The next prime is 83678533. The reversal of 83678513 is 31587638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31587638 = 2 ⋅15793819.

It can be written as a sum of positive squares in 2 ways, for example, as 38291344 + 45387169 = 6188^2 + 6737^2 .

It is a cyclic number.

It is not a de Polignac number, because 83678513 - 2¹⁸ = 83416369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83678533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573068 + ... + 573213.

It is an arithmetic number, because the mean of its divisors is an integer number (21206217).

Almost surely, 2^83678513 is an apocalyptic number.

It is an amenable number.

83678513 is a deficient number, since it is larger than the sum of its proper divisors (1146355).

83678513 is a wasteful number, since it uses less digits than its factorization.

83678513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146354.

The product of its digits is 120960, while the sum is 41.

The square root of 83678513 is about 9147.5960229997. The cubic root of 83678513 is about 437.3924860164.

The spelling of 83678513 in words is "eighty-three million, six hundred seventy-eight thousand, five hundred thirteen".